v0.11.0

Added:

- User-defined structures in report configuration for pivot outputs.
  Although not required (will default to a sheet named after the table
  and cell B4), allows for more flexibility in data output.

- Pivot table configuration can now choose to be formatted or not.

- Un-needed sheets are removed prior to saving a spreadsheet.

Changed:

- Checking for report templates has become more robust to cover edge
  cases of it not being found.

Fixed:

- Formatting for pivot tables in an Excel sheet will work correctly if
  no subtotals have been specified.